My dad turned off our computer by holding down the power button, and now when we start it back up, a dos looking screen comes up and tells us that it was turned off the wrong way. But i have no clue what to type in to get out of the screen so i can use my computer. Yes i have linux, my cousin built us that computer and we dont really know our way around it yet. Any help would be appreciated.

Its Fedora. And i cant really remember what it says because we havent used it it a while. And in order to use it i have to hook it all up again. But i will do that and see if control+d works. Thanks for the help.